6.18-stable review patch. If anyone has any objections, please let me know.
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From: Christian Brauner brauner@kernel.org
[ Upstream commit 768b1565d9d1e1eebf7567f477f7f46c05a98a4d ]
Otherwise we trip VFS_WARN_ON_ONC() in __ns_tree_add_raw().
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-6-2e6f823e... Fixes: 7c6059398533 ("cgroup: support ns lookup") Tested-by: syzbot@syzkaller.appspotmail.com Reviewed-by: Jeff Layton jlayton@kernel.org Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/cgroup/namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/cgroup/namespace.c b/kernel/cgroup/namespace.c index fdbe57578e688..db9617556dd70 100644 --- a/kernel/cgroup/namespace.c +++ b/kernel/cgroup/namespace.c @@ -30,7 +30,6 @@ static struct cgroup_namespace *alloc_cgroup_ns(void) ret = ns_common_init(new_ns); if (ret) return ERR_PTR(ret); - ns_tree_add(new_ns); return no_free_ptr(new_ns); }
@@ -86,6 +85,7 @@ struct cgroup_namespace *copy_cgroup_ns(u64 flags, new_ns->ucounts = ucounts; new_ns->root_cset = cset;
+ ns_tree_add(new_ns); return new_ns; }